6961249789577 has 2 divisors, whose sum is σ = 6961249789578. Its totient is φ = 6961249789576.

The previous prime is 6961249789517. The next prime is 6961249789579. The reversal of 6961249789577 is 7759879421696.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6875219620096 + 86030169481 = 2622064^2 + 293309^2 .

It is a cyclic number.

It is not a de Polignac number, because 6961249789577 - 2¹² = 6961249785481 is a prime.

Together with 6961249789579, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (6961249789579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3480624894788 + 3480624894789.

It is an arithmetic number, because the mean of its divisors is an integer number (3480624894789).

Almost surely, 2^{6961249789577} is an apocalyptic number.

It is an amenable number.

6961249789577 is a deficient number, since it is larger than the sum of its proper divisors (1).

6961249789577 is an equidigital number, since it uses as much as digits as its factorization.

6961249789577 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2880541440, while the sum is 80.

The spelling of 6961249789577 in words is "six trillion, nine hundred sixty-one billion, two hundred forty-nine million, seven hundred eighty-nine thousand, five hundred seventy-seven".